Type-writing machine.



F; A. YOUNG.

TYPE WRITING MACHINE. APPLICATION FILED $22122, 1910.

Patented Nov. 12, 19,12.

UNITED STATES PATNT FRANK A. YOUNG, OF NEW YORK, N. Y., ASSIGNOR T UnnERwoOn TYPEW'RITER COMPANY, OF NEW YORK, N. Y., A CORPORATION OE DELAWARE.

TYPE-WRITING MACHINE.

Specification of Letters Patent.

Patented Nov. 12,1912.

Application filed September 22, 1910. Serial No. 583,265.

To all whom "it may concern:

Be it known that I, FRANK A. YOUNG, a citizen of the United States, residing in New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Type- Writing Machines, of which the following is a specification.-

This invention relates to a brake for carriages of typewriting machines.

Heretofore, the depression of a key pressed a shoe against a brake-strip on the carriage, the pressure on the key controlling the braking efiect.

One object of the invention is to increase the braking effect obtainable by pressure on the key to which end, I provide preferably upon the machine frame, a pair 0 opposed brake jaws between which travels a brake strip, preferably mounted on the carriage. One of said brake jaws is controlled by a key to force the brake strip into contact with the other jaw. This arrangement doubles the braking efiect obtainable by the pressure applied to the key, because the pressure of one jaw against the brake strip is resisted by the equal pressure or reaction of the opposing or stationary jaw. The brake strip is yielding facewise, to enable it to accommodate itself to the positions of the jaws, or to permit the full clamping force of the jaws to be exerted in opposition to each other, without appreciable opposition from the strip itself.

In the accompanying drawings, Figure 1 is a perspective, showing one embodimentof the invention applied to the tabulating bracket of an Underwood writing machine. Fig. 2 is a section, showing the brake idle. Fig. 3 is a plan of the braking strip and its supports. Fig. 1 is a sectional view, showing the braking device in use.

A carriage 1 rides on the front and rear rails 2 and 3 of a frame 4. The customary escapement, including a pinion 5 in mesh with a rack 6 on the carriage, controls the letter-feeding of the carriage, which is driven by a strap 6 connected to the usual spring (not shown).

The depression of any of a set of tabulating keys 7 rocks a corresponding key lever 8 pivoted at 9 to thrust the upper end of a stop rod 10 into the path of a column stop 11 adjustable on a rack 12 on the carriage. The thrust of the stop rod 10 causes ried by a shoulder 13 to vibrate an arm 1 1 on a rock shaft 15, which carries a second arm 16, the latter through a link 17, rocking a lever 18 that is pivoted at 19, to release the letterspacing rack 6 (pivoted at 6 from the escapement pinion 5, (see Fig. 4

The carriage is retarded by a pair of jaws 20, 21 engaging opposite sides of a brake strip 22 on the carriage; said jaws being supported in the present instance, by arms 23 on a bracket 241 secured to the frame 1, in which the stop rods 10 are usually housed, and jaw being movable toward stationary jaw 21.

Each stop rod 10 has a second shoulder 25 to lift a lever or bail 26, 27, pivoted 011 a rod 28, to cause a projection orroll 29 carthe lever 26 to bear against an incline or cam shoulder 30 carried by the mov' able brake jaw or member 20, to cause the latter to force or swing the brake strip 22 against the opposed fixed jaw 21, which may rest against said rod 28. The lever 26 is formed preferably of a bail, the cross piece 27 of which extends across all the shoulders 25, to enable any of the series of stop rods 10 to operate the brake. The strip is preferably hinged at its ends at 31 by means of pendent arms 31 to brackets 32 pro ecting rearwardly from the carriage j 1. The pressure on the key 7 operates the jaw 20 to press the strip against jaw 21. The jaws may be faced with leather or other renewable shoes 33. A spring 3 1 returns the stop rod 10 to idle position, whereupon the jaw 20 springs away from the brake strip 22. The members 20 and 21 may be made of one strip of resilient metal bent into U shape to fit upon a fixed rod 35 on bracket 23; an car 36 being bent over the rod to retain the members thereon.

Variations may be resorted to within the scope of the invention, and portions of the improvements may be used without others.

Having thus described my invention, I claim:

1. In a typewriting machine, the combination with a power-driven carriage, of opposed stationary and movable braking jaws, a yielding braking strip carried between the jaws, said strip and jaws being relatively movable, and a key to press the movable brake jaw against the braking strip and force the latter against the stationary brake aw.

.nation with a power 2. In a typewriting machine, the combination with a power-driven carriage, of a pair of opposed jaws, a yielding brake strip between the jaws, and means to press one of the jaws against the strip and force it against the opposite jaw.

3. In a typewriting machine, the combination with a power-driven carriage, of a braking strip on the carriage, and opposed movable and stationary braking jaws on the machine frame between which the strip travels.

4. In a typewriting machine, the combination with a power driven carriage, of a braking strip hinged to the carriage, a pair of braking jaws on the machine frame on opposite sides of the strip, and means to engage the jaws and strip.

5. In a typewriting machine, the combidriven carriage, of a braking strip hinged to the carriage, a pair of braking jaws on the machine frame on opposite sides of the strip, one of which is movable toward and from the other, and a key controlling the movable jaw to press it against the strip and force the latter against the stationary jaw.

6. In a typewriting machine, the combination with a power-driven carriage, of a braking strip on the carriage, opposed brak ing jaws on the machine frame between which the strip travels, one of said jaws being shiftable, and means to press the shiftable jaw against the strip and engage the latter with the opposite jaw.

7. In a typewriting machine, the combination with a p0wer-driven carriage, of a braking strip on the carriage, a shiftable braking jaw, a cam, a lever to engage the cam and force the jaw against the strip, and a stationary jaw against which the strip is forced. v

8. In a tabulating mechanism for typewriting machines, the combination with a power-driven carriage, of a series of stop rods any of which may be selected to arrest the carriage, shoulders on the rods, opposed braking jaws, one of yielding brake strip oirthe carriage traveling between the jaws, a cam, and a lever struck by a shoulder on the selected stop-rod to engage the cam and cause the jaws to bite on the strip.

FRANK A. YOUNG.

l/Vitnesses:

RALPH S. WARFIELD, K. FRANKFORT.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C.

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